60 Questions
What is the energy charge per kWh for the first 50 kWh of a household's monthly energy consumption?
67.07 c/kWh
A household uses 350 kWh of energy in a month. Which block of the tariff structure will it fall under?
Block 3
How do you calculate the cost of using an electrical appliance?
power rating x time x price
What is the total cost of using a 1500 W microwave for 1 hour, in rands?
R1.07
Why are LED lights preferred over incandescent bulbs?
They are more energy-efficient
What is the purpose of conducting a household energy survey?
To understand your household's energy consumption
What is the environmental levy per kWh for a household's monthly energy consumption?
2.28 c/kWh
A household uses 700 kWh of energy in a month. How much will it cost, in rands?
R592.13
What is the total cost of using a 2200 W fridge for 24 hours, in rands?
R37.83
How many blocks are there in the tariff structure?
4
What is the unit of energy used to measure the energy consumption of an appliance?
Kilowatt-hours (kWh)
What is the purpose of a tiered tariff system?
To charge higher rates for higher usage
What is the formula to calculate energy consumption?
energy = power x time
What is the primary electricity supplier in South Africa?
Eskom
What is the unit of power used to measure the power consumption of an appliance?
Watts (W)
What is the meaning of 1 kWh?
1 kWh is the energy used by a 1000 W appliance running for 1 hour
What is the formula to calculate energy consumption in kWh?
energy = power (in kW) x time (in hours)
What is the purpose of VAT (Value-Added Tax)?
To add a tax to the value of goods and services
What is an electrical appliance?
A device that uses electrical energy to perform a function
What is the purpose of a survey?
To gather data from respondents to gain information
What is the primary function of a tiered tariff system?
To encourage responsible energy consumption by increasing rates for higher usage
What is the unit of measurement for power consumption of an appliance?
Watts (W)
Why are kilowatt-hours (kWh) used to measure energy consumption?
Because they make large numbers more manageable
What is the purpose of conducting a household energy survey?
To gather data on energy consumption patterns
What is the formula to calculate energy consumption in Joules?
Energy = Power × Time
What is the purpose of adding VAT (Value-Added Tax) to the cost of energy?
To generate revenue for the government
What is the definition of an electrical appliance?
A device that uses electrical energy to perform a function
What is the total energy cost in cents for a household using 450 kWh in a month?
31,691.2
How does Eskom charge consumers for their energy usage?
Based on a tiered tariff system
A household uses a 1000 W (1 kW) electric kettle for 2 hours a day. What is the daily energy cost in cents?
147.2
What is the benefit of using LED lights over incandescent bulbs?
All of the above
What is the purpose of measuring energy consumption?
All of the above
What is the energy charge in cents per kWh for the block of 351-600 kWh?
124.74
What is the main purpose of conducting a household energy survey?
To understand household energy consumption
If a household uses 800 kWh in a month, in which block of the tariff structure will it fall?
Block 4
What is the total cost in rands for a household using 600 kWh in a month?
R420.12
A household uses a 2500 W (2.5 kW) air conditioner for 5 hours. What is the energy cost in cents?
906.25
What is the environmental levy in cents per kWh for all blocks of the tariff structure?
2.28
What is the total energy cost in cents for a household using 250 kWh in a month?
21,490.5
A household uses a 500 W (0.5 kW) television for 8 hours a day. What is the daily energy cost in cents?
36.18
A household uses 420 kWh of energy in a month. What is the total energy cost in cents?
30,170.4
A 1200 W (1.2 kW) electric oven is used for 3 hours a day. What is the daily energy cost in cents, assuming a price of 85.60 c/kWh?
3,442.4
A household wants to reduce its energy consumption. Which of the following appliances would be the best replacement for an incandescent bulb?
LED bulb
A household uses a 3000 W (3 kW) air conditioner for 4 hours a day. What is the daily energy cost in cents, assuming a price of 139.31 c/kWh?
5,625.48
A household uses 550 kWh of energy in a month. In which block of the tariff structure will it fall?
Block 3
A 2000 W (2 kW) microwave is used for 2 hours a day. What is the daily energy cost in cents, assuming a price of 83.32 c/kWh?
3,599.2
A household wants to reduce its energy consumption. What would be the most effective way to do so?
Using energy-efficient appliances
A 1500 W (1.5 kW) electric kettle is used for 3 hours a day. What is the daily energy cost in cents, assuming a price of 67.07 c/kWh?
2,512.65
A household uses 720 kWh of energy in a month. What is the total energy cost in cents?
62,783.2
A 1000 W (1 kW) electric toaster is used for 2 hours a day. What is the daily energy cost in cents, assuming a price of 85.60 c/kWh?
1,904
What is the primary reason why Eskom uses a tiered tariff system?
To recover the costs of generating and distributing electricity
What is the unit of measurement for the total amount of visible light emitted by a source?
Lumens
What is the purpose of adding VAT to the cost of energy?
To redistribute wealth from households to the government
Why is it impractical to use joules to measure monthly energy consumption?
Because the numbers are too large and impractical
What is the formula to calculate energy consumption in joules?
Energy = Power x Time
What is the purpose of conducting a household energy survey?
To gather data on energy consumption patterns
What is the unit of measurement for energy consumption of an appliance?
Kilowatt-hours
Why is 1 kWh equal to 1000 W of power used for 1 hour?
Because 1 kWh is a unit of energy
What is the primary function of a tiered tariff system?
To recover the costs of generating and distributing electricity
What is the purpose of estimating energy consumption?
To calculate the cost of energy consumption
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